Ok so long story short, my brother has an 01 7.3 with 300k-ish on it. His batteries died this winter and he wasn't able to change them out for 3 weeks or so (he has a daily driver car). When he finally got around to changing the batts, the truck ran rough and gave an SES code. So far he has changed the plethora of sensors throughout and gotten a new IDM however he still has the issue. He and I think the PCM went bad while it was dead.

Back to my original question, can I put my PCM in his truck to see if that is the issue without harming my PCM?

Yes, the E99 to L99-01(DPC-402 to DPC-422) swap will work just fine. However, in certain cases the DPC# will have to match for everything to work correctly. For instance, you cannot swap a PMT1(DPC-422) and NMC1(DPC-452). Your glow plugs will not work.

Quote:

Originally Posted by CSIPSD

Yup... regardless what some people tell you... so long as your not swapping a 99-2001 into a 2002-2003 or vs your good.

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